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katen-ka-za [31]
3 years ago
13

Please help i will give brainliest

Mathematics
1 answer:
arlik [135]3 years ago
6 0
Here’s my answers, for #10 it got cut off but I got m=9/7 and d=11.40

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Suppose a line has slope -2/3 and passes through the point (1, 8). which other point must also be on the graph?
Arisa [49]
<h3>Answer:   Choice A.   (7,4)</h3>

============================================

Explanation:

Use the slope and given point to find the y intercept

y = mx+b

8 = (-2/3)*(1) + b

8 = -2/3 + b

8 + 2/3 = b

24/3 + 2/3 = b

26/3 = b

b = 26/3

The equation of the line is y = (-2/3)x + 26/3

To confirm this, plug in x = 1 and we should get y = 8, due to the point (1,8)

y = (-2/3)x + 26/3

y = (-2/3)*1 + 26/3

y = -2/3 + 26/3

y = (-2+26)/3

y = 24/3

y = 8

So that verifies we have the correct equation.

--------------

Next, go through each answer choice to see if the x coordinate of the point leads to the y coordinate.

If we try x = 7, then,

y = (-2/3)x + 26/3

y = (-2/3)(7) + 26/3

y = -14/3 + 26/3

y = (-14+26)/3

y = 12/3

y = 4

This shows that (7,4) is on the line. Choice A is the answer

That rules out choice B.

----------------

If we tried x = -5, then,

y = (-2/3)x + 26/3

y = (-2/3)(-5) + 26/3

y = 10/3 + 26/3

y = 36/3

y = 12

meaning that (-5,12) is on the line. That rules out choices C and D.

Refer to the graph below. It visually confirms that of the four answer choices, only point A is on the line. I used GeoGebra to make the graph.

5 0
2 years ago
Please help! Will give 20 Brainly points!
pshichka [43]

Answer:

Part A: 3:2 or 3 to 2

Part B: 18 + 12 = 30

5 0
2 years ago
Read 2 more answers
What is 5 multiplied by 2/7 as a mixed number
ivolga24 [154]
10/7 which equals 1 and 3/7
5 0
3 years ago
Read 2 more answers
The price of Phillips favorite candy has been reduced by 15 cent per piece. Philips buys 14 pieces and spend $3.22 what is the r
Tamiku [17]
Well, if we divide 3.22 by 14 we get 0.23
0.23 +0.15 is 0.38
the answer would be $0.38
8 0
3 years ago
Can someone please help me with this problem
pychu [463]
Oh wait a minute i have to write this down
5 0
3 years ago
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